Properties.getProperty() and you'll see the following:
Object oval = super.get(key);
String sval = (oval instanceof String) ? (String)oval : null;
return ((sval == null) && (defaults != null)) ?
defaults.getProperty(key) :
sval;
So, this looks like a bug in ActiveMQ .
We're trying to use ActiveMQ (4.2-SNAPSHOT 06/07/07) on JBoss 4.0.4 and are
running into an interesting problem - somehow ActiveMQ is managing to set a
null system property. Null system properties are disallowed in Java. The
property in question is org.apache.activemq.kaha.Store and is set in the
